On 16.06.2024 10:38, Krzysztof Kozlowski wrote: > On 14/06/2024 09:19, Claudiu wrote: >> From: Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx> > >> + >> +maintainers: >> + - Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx> >> + >> +properties: >> + compatible: >> + items: >> + - const: renesas,rzg3s-vbattb >> + - const: syscon >> + - const: simple-mfd > > No, mfd does no look good. That's not a simple device anymore and you > claim here child does not need vbat bclk, power domains and resets? That > would be a big surprise, although technically possible. I wasn't sure how this MFD will be received by the Renesas maintainers so I kept it simple for this version. In theory the VBAT clk, power domain and resets are specific to VBAT module itself but, indeed, the child cannot work w/o these. > > Please clarify: which of parent resources are needed for children? VBAT clock, power domain are needed. Reset, too. In the current implementation the reset is deasserted though parent by calling the syscon_node_to_regmap(np->parent) in the clock driver. > > ... > >> + >> +additionalProperties: false >> + >> +examples: >> + - | >> + #include <dt-bindings/clock/r9a08g045-cpg.h> >> + #include <dt-bindings/interrupt-controller/arm-gic.h> >> + >> + vbattb: vbattb@1005c000 { >> + compatible = "renesas,rzg3s-vbattb", "syscon", "simple-mfd"; >> + reg = <0x1005c000 0x1000>; >> + ranges = <0 0 0x1005c000 0 0x1000>; >> + interrupts = <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>; >> + interrupt-names = "tampdi"; >> + clocks = <&cpg CPG_MOD R9A08G045_VBAT_BCLK>; >> + clock-names = "bclk"; >> + power-domains = <&cpg>; >> + resets = <&cpg R9A08G045_VBAT_BRESETN>; >> + #address-cells = <2>; >> + #size-cells = <2>; >> + status = "disabled"; > > Drop Could you please clarify this? Would you want me to drop the full node (same for clock-controller node)? Can you point me an example that you are thinking about? Thank you, Claudiu Beznea > >> + >> + vbattclk: clock-controller@1c { >> + compatible = "renesas,rzg3s-vbattb-clk"; >> + reg = <0 0x1c 0 0x10>; >> + clocks = <&cpg CPG_MOD R9A08G045_VBAT_BCLK>, <&vbattb_xtal>; >> + clock-names = "bclk", "vbattb_xtal"; >> + #clock-cells = <0>; >> + power-domains = <&cpg>; >> + status = "disabled"; > > Drop > >> + }; >> + }; >> + >> +... > > Best regards, > Krzysztof >